Halo 3: Mythic

Console

Xbox 360

Project

OpenH3M

Runs On

Windows

Version

beta-0.8, Aug 17, 2026

Completeness

Partly Playable - “Beta 0.8 brings the complete 3D menu presentation, Custom Games, local split screen, and Forge to PC”

Decomp Buddy never downloads games. It sets up OpenH3M and tells you exactly which file of yours to drop in - then checks it's the right one. A ready-made plan is published for this one, so no AI key is needed.